Ring-roll for leather-splitting machines.



W. D. QUIGLEY.

RING ROLL FOR LEATHER SPUTTING MACHINES. APPLICATION FILED DEC. 1. 1915.

L fi fiwa Patented 5111 10, 191":

WILLIAM D. QUIGLEY, 0F MELROSE, MASSACHUSETTS.

RING-ROLL FOR LEATHER-SPLITTING MACHINES.

Specification of Letters Patent.

Patented July illl, lltliil't.

Application filed December 1, 1915. Serial No. 64,406.

To all whom it may concern:

Be it known that I, WILLIAM D. QUIGLEY, a citizen of the United States, residing at Melrose, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Ring-Rolls for Leather- Splitting Machines, of which the following is a specification.

Leather splitting machines, as commonly constructed. usually have a gage-roll ar ranged above the splitting-knife, and a supporting-roll, commonly termed a ring-roll arranged below said knife, and said ringroll is of a yielding character, and rests upon a large cylinder, usually having a yielding surface, whereby variations in the thickness of the hide or skin are compensated for. One of the well-known forms of ring-rolls now in common use comprises a shaft having a plurality of rings arranged upon it, said rings having large center-ho1es permitting independent movement thereof transversely with respect to the shaft. These rings are held in alinement while resting upon or engaging the yielding surface of the cylinder with substantially an equal pressure, but on account of variations in the hide or skin, they are caused to move independently of each other, transversely with respect to the shaft and out of alinement. Said rings are held in place upon the shaft and definitely spaced apart by separate holding or spacing means for each ring, and, as a result, they have a tendency to wabble, 2'. 6., to move angularly or obliquely with respect to the shaft more or less, according to the amount and direction of pressure exerted upon them, for it will be understood that the variations in the thickness of the hide or skin are of an undulating form, and thereby exert pressures in varying directions as well as of varying degrees.

On account of independent movement of the rings and their tendency to move obliquely to the shaft, the gage-roll and knife edge, each ring, so moved, leaves its individual mark on the hide or skin, causing loss in quality and quantity of splits that can be produced from each hide. Other ring-rolls have been devised having the rings more or less closely associated together and adapted to have independent relative movements, but by reason of such relative movements defined shoulders are formed on the surface of the roll by which ring lines are produced.

My present invention has to do particularly with the ring-roll, and has for its object the construction of a ring-roll having a plurality of rings arranged for movement transversely or at right angles with respect to a suitable core-piece, whereby the formation of ring-lines is avoided. In carrying out my invention, the rings are arranged on a core piece of some sort at right angles to the axis of the roll and in contiguous relation with each other, instead of being separately held definitely spaced apart by spacing-nieans, and unyielding holding-means are provided for holding them so disposed,

and while their engagement with each other is not such as to interfere with their relative movements, yet is sufficient to prevent them from wabbling or moving obliquely with respect to their supporting-means. As each ring is held against wabbling by the adjacent rings and is permitted to move only at right angles to the axis of the roll, the several rings therefore having a sliding engagement with each other. J

The rings are arranged on a uniformly elastic core of a diameter corresponding to the diameter of the center holes in the rings, and when disposed thereon, in sliding engagement with each other, movement of any ring will tend to deflect the core, not only for a distance equal to the thickness of the ring, but also for a short distance both sides thereof, so that such deflection of the core will be felt by the adjacent rings, thus to provide a continuous uninterrupted cleflectedsurface on the roll.

Figure 1 is a side elevation of a portion of a leather splitting machine, having a ringroll and frame bearing it, embodying this invention.

Fig. 2 is a longitudinal vertical section and partial elevation of one end-portion of a roll and frame.

Referring to Fig. 1, 1 represents the splitting-knife, 2 the gage-roll, 3 the ring-roll, and 4 the cylinder on which the ring-roll pests, said cylinder having a yielding surace.

Referring to Fig. 2, illustrating one improved form of ring roll embodying my invention, 10 represents a tubular cylindrical core of rubber or other uniformly elastic material which is adapted to be deflected, and to deflect or yield alike at both sides of the points of deflection. It is made of a length to extend nearly from end to end of the roll. The inner faces of the side-pieces 5 of the frame, have circular bosses 7 of a diameter corresponding to the outside diameter of the roll, and said bosses are socketed as at 8, the sockets being of a diameter corresponding to the outer diameter of the core. In'said sockets cylindrical blocks 9are fitted, likewise of a diameter corresponding to the outer diameter of the core, and the inner ends of said blocks are provided with threaded extensions 12, which project into the tubular bore of the core for a considerable distance. These blocks form end-supports for the core by which they are connected with the bosses. The blocks 9 preferably project inward beyond the inner ends of the bosses.

A plurality of rings 15 are arranged on said core 10, side by side, in contiguous relation and sliding engagement with each other. The center-holes through said rings correspondin diameter with the outer diameter of the core. Said rings are held in place on the core by being abutted together, and the end-most rings abut against the inner ends of the bosses of the roll-supporting frame, and said roll-supporting frame is held by the main frame of the machine. Said rings are not too tightly pressed'together as it is necessary that they shall have easy sliding relative movements with respect to each other but such sliding movements are at right angles to the core. They are thus held and consequently prevented from wabblingor moving obliquely with respect to the core by their engagement with each other, and with their unyielding end holding means. The end-most rlngs may be made of different thicknesses so as to insure a tight fit or arrangement of the rings.

When the machine is not in use, the rings 15-rest-upon the yielding surface of the cylinder 4, being in alinement throughout the entire length of the ring-roll, but when a hide or skin passes over said ring-roll, one

or moreof the rings will be caused to move transversely with respect to the core and to slide With respect to eontiguously disposed rings, as may be required, to accommodate the varying thicknesses of the hide or skin, and such sliding movements of the rings, it will be observed, will be always at right anglesto the core.

1 Furthermore, as each ring is pressed down thetendency is for the core to yield and to be deflected not only for a distance equal to the'thickness of the ring so moved, but also for short distances at both sides of the ring and on account of the core being adapted to yield alike at both sides of the points of compression, deflection of the core is alike or equal at both sides of the ring somoved, and

such deflection of the core is felt by the adjacent rings and consequently said adjacent rings are caused to move slightly, and

a continuous uninterrupted deflected surface will result, and ringlines will be avoided.

I claim 2- 1. A ring-roll for leather splitting machines comprising a plurality of rings contiguously disposed and adapted for sliding engagement with each other, a core extended through center-holes in said rings and engaging the inner peripheries of the rings, said core being uniformly elastic and deflectable throughout the major portion of its length, whereby upon relative movement of any ring that portion of the core within said ring and portions at each side, thereof .will be deflected'and the adjacent rings thereby effectively influenced, and end-holding means for the rings.

2. A ring-roll for leather splitting ma- I chines comprising a core of uniform elasticity throughout the major portion of its length, and a plurality of rings arranged thereon, in engagement therewith, said rings being contiguously disposed and adapted for relative sliding movement, the depression of any ring causing corresponding deflection of that portion of the core which isengaged by it and also slight deflection of the'core at each side thereof so that the adjacent rings will be effectively influenced and asubstantially smooth surface maintained notwithstanding its deflection. 3. A ring-roll for leather splitting-Inachines-comprising a plurality of rings contiguouslydisposed and adapted for sliding engagement with each other,"acor'e extended through center-holes in said ringsc'andengaging the inner peripheries of the rings, said core being uniformly elastic deflectable throughout the major portion ofits length, whereby upon relative movementof any ring that portion of the core within said ringand portions at each 'side thereof will be deflected and the adjacent rings thereby effectively influenced, "and journals connected with the-ends of said coreadap'ted for engaging end-holding means thereby to support'the roll. v

a. A ring-roll for leather splitting machines comprising a plurality of rings contiguously: disposed and adapted for sliding engagement with each other, acore'extended through center-holes insaid rings and engaging the inner peripherie's'of'the rings, said core being uniformly elastic and defiectable throughout the major portion of its length, wherebyupon relative movementof any ring that portion-of the corewithin said ring and portions at eachside thereof Will be deflected and the adjacentringsthereby effectively influenced, journals connected with the'ends of said core, and end-holding means arranged to receive said journals a'nd thereby support the core, and also tohold the rings on the core in contiguousrelation.

5. A ring-roll for leather splitting *ma- 12o chines comprising a tubular cylindrical rubber core, a plurality of rings arranged thereon, in engagement therewith and with each other, the depression of any ring causing corresponding deflection of that portion of the core which is engaged by it, and a slight deflection of the core at each side of it, so that the adjacent rings will be effectively influenced and a substantially smooth surface maintained, notwithstanding the deflection, and end-holding means for the rings.

6. A ring-roll for leather splitting machines comprising a tubular cylindrical rubber core, a plurality of rings arranged thereon, in engagement therewith, end-holding means for the rings having sockets, and cylindrical blocks arranged in the sockets, having extensions which enter the core, said blocks serving as journals for the roll.

7. A ring-roll for leather splitting machines comprising a tubular cylindrical rubber core, a plurality of rings arranged thereon, in engagement therewlth, journals projecting from the ends of the core of a diameter corresponding to the diameter of the core, and socketed bosses on a frame structure arranged to receive said journals.

8. A ring-roll for leather splitting machines comprising a tubular cylindrical rubber core, a plurality of rings arranged thereon, in engagement therewith, journals projecting from the ends of the core of a dlameter corresponding to the diameter of the core, socketed bosses 011 a frame structure arranged to receive said journals, and other rings interposed between the ends of the bosses and the aforesaid rings for holding the latter in assembled position.

In testimony whereof, I have signed my name to this specification, in the presence of 40 two subscribing witnesses.

WILLIAM D. QUIGLEY.

W'itnesses:

B. J. Noyes, H. B. DAVIS.

Copies of this patent mav he obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

